The invention relates to pharmaceutical compositions comprising a statin and a cannabinoid, and their use for the treatment of hypercholesterolemia and atherosclerosis. It has been found that compositions combining a statin and a cannabinoid are improved over existing statin formulations. The compositions of the invention for example allow for a lower effective dose of statin and a reduction of the adverse effects seen with statins taken alone. Dosing ranges and formulations suitable for oral, buccal, and sublingual administration are disclosed. Various specific cannabinoids such as cannabidiol and synthetic cannabidiols selected for their anti-inflammatory, antioxidant, and anti-atherosclerotic effect are shown to be particularly advantageous.